PHP:
Have seen the private message. If the definition is correct, it must be very short and instant. Embarrassed, I don't know how to use what-you-called instant messenger and I am an old dog that fails new trick.
On the contrary, you "can" teach an old dog new tricks! Instead of an e-mail type slower-feedback, we could communicate much faster where both are present at each end of network through a program called an instant messanger. I would not call a post to a thread instant, regardless of how fast it takes to get to the other end, because one has to wait certain amount of time for a feed-back when the other is absent and is unable to reply.
I believe Future Tense, an action, can be within present time, it depends to what and how big a part of time you are referring to; a week or a month. You refer to "today" as being the present time and a Future Tense action can take place within that.
As to whether a future time exists within the present time, that depends on individual imagination.
PHP:
If we combine (1) and (2) above, the conclusion can be the future time is overlapped with the present time, actually seamlessly. In other words, as can be said, future time and present time are the same. You cannot separate future time completely from the present time.
Of course you cannot separate present from future time, but they are not the same. Time is a one thing, but we can put pauses between the past, present, and future time. It depends to what big of a piece of time you refer to, for example; if you refer to a minute as being the present time, anything after that will be the future time. Also, if you refer to present time as being 1,000 years, anything beyond that is future time.
Can we agree that past, present or future time can be consisted of a minute, an hour or a year? And Past Tense, Present Tense or Future Tense have their specific action that took, is taking, will or is going to take place within the time? Can this be the difference between future action and future time?
Which in turn would give you a definition of what future time is.
PHP:
That is to say, whatever the time, whether it is future or present is grammatically up to our choice. Isn't "today" itself compatible with the Future Tense, as in the following example?
Ex: Today will be a rainy day.
Today already happened, because you use the sentence while you exist within this time, that is "today", therefore it is the present time as the whole part that you're refering to. It will not rain constantly within this day, because if it did you can't write the sentence like that. If its constantly raining througout the day and you exist within it at a present time, then it can't be classified as future.
So, here we are refering to an action that is part of a different time and will happen at some point during the "day". I am talking about a 'day' and not "today". It does not have to rain constantly to be classified as a rainy day. "Today" we would refer to a specific time, a big part of time, and an action like rain could happen during the day time, anytime. Today is 24 hours and a day can be from dawn till dusk. To conclude, "will be a rainy day" is part of Future Tense, but you cannot include today as a whole to be part of future, unless you broke it to pieces and refered to hours, which would be a different time altogether. Today can't be, but a day can.
PHP:
Even a present action can be described in Future Tense:
Ex: John will be in his office now.
Maybe The Future Tense is described in present action?
If he is going to be in his office then how can he be there right this instant. Maybe the sentence is formed incorrectly, or "now" is refering to a certain amount of time as in a minute. He will be coming within this minute which would be considered as present time "now", not The Present Tense.
PHP:
If the action is certain, however, even a so-called future action is described in present tenses, Simple Present or Present Progressive:
Ex: We go to Europe tomorrow/next weekend.
Isn't the above shortened for; we are going to go to Europe tomorrow/next weekend, which would state that something will take place, a future action in a future time. The meaning changes about "we are" when you relate to future and present. When you say "we are", you are refering to present, because you exist now. When you say that "we are going to go tomorrow", and when that future time happens and becomes the present, you are going to Europe.